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. Feb- 13, 1962
D. F. SAMHAMMER ETAL
3,021,099
UNIVERSAL HYDRAULIC DRILL POSITIONER
Filed. NOV. 4, 1958
4 Sheets-Sheet 1
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BY
95
AMWZM
ATTORNEY
Feb- 13, 1962
D. F. SAMHAMMER ETAL
3,021,099
UNIVERSAL HYDRAULIC DRILL POSITIONER
Filed. Nov. 4, 1958
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4 Sheets-Sheet 2
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Feb. 13, 1962
D. F. SAMHAMMER ETAL
3,021,099
UNIVERSAL HYDRAULIC DRILL POSITIONER
Filed. Nov. 4, 1958
4 Sheets-Sheet 3
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INVENTORS;
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BY
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‘ ATTORNEY
Feb. 1.3, 1962
3,021,099
D. F. SAMHAMMER ETAL
UNIVERSAL HYDRAULIC DRILL P’OSITIONER
Filed. Nov. 4, 1958
4 Sheets—Sheet 4
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BY
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ATTORNEY
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United
Patented Feb. 13, 1962
2
taken together with the accompanying drawings wherein
UNIVERSAL
3,021,099
RAULIC DRILL POSITHGNER
an embodiment of the invention is illustrated. It is to be
expressly understood, however, that the drawings are for
Donald F. Samhammer and Earl B. Lear, Utica, N.Y.,
assignors to {Ihicago Pneumatic Tool Company, New
York, N.Y., a corporation of New Jersey
Filed Nov. 4, 1958, Ser. No. 771,862
14 Claims. (Cl. 248-—16)
purposes of illustration and description, and are not to be
This invention pertains to a device for supporting and
selectively positioning a drill of the type carried upon a
tion;
slide guide.
A general object of the invention is to provide a device
for e?ecting universal positioning of a drill slide guide
construed as de?ning the limits of the invention.
In the drawings:
FIG. 1 is an elevational view of the left end of a uni
versal hydraulic drill positioner embodying the inven
FIG.
FIG.
FIG.
FIG.
FIG.
2 is a side elevational view;
3 is a top plan view taken on line 3—-3 of FIG. 1;
4 is a section taken on line 4-4 of FIG. 1;
5 is a right end elevational view of the casting;
6 is an elevational View detailing the neck and
and the associated drill thereon.
A further object of the invention is to provide a device 15 lower portions of the trunnion;
which is hydraulically and remotely operable for effect
FIG. 7 is a modi?ed form of the saddle section of
ing universal positioning of a drill slide guide about a
the trunnion;
horizontal axis and about an axis normal to the latter.
A further object of the invention is to provide a com
FIG. 8 is a detail of the clamp yoke bar;
FIG. 9 schematically illustrates the position of the
chassis dumped 90* degrees counterclockwise from the
position in FIG. 2; and
FIG. 10 schematically illustrates the position of the
chassis when the dump crank has been adjusted counter
mon chassis for supporting interchangeable drill slide
guide mounting trunnions.
Another object of the invention is to provide a support
for a drill slide guide, which is adapted to be removably
clamped for pivoting about a ?xed shaft.
clockwise relative to the shaft.
Another object of the invention is to provide a chassis 25
In the drawings is shown a universal drill positioner.
which is pivotable about a ?xed horizontal axis and sup
It includes a casting block or chassis 11 having a cylin
ports a drill slide guide trunnion mount for rotation about . drical portion Ill through which a vertical bore 12 opens
an axis normal to the horizontal axis, together with a
through the top and bottom surfaces of the chassis. Re
pair of ?uid powered elements which are interchangeable
tained in the bore for rotation about a vertical axis is a
with one another for eifecting pivoting of the support and
trunnion 13 serving to support and position a drill slide
rotation of the trunnion mount.
guide 14. The trunnion includes an elongated cylindrical
A feature of the invention is a supporting structure for
lower portion 15 which is borne for rotation in the bore
‘a drill slide guide which permits selective positioning
12 and depends to the bottom of the chassis. Projecting
above the top end of the bore is a neck portion 16 of the
of the drill slide guide about a horizontal axis, and about
35 trunnion having a diameter greater than the bore, where
an axis normal to the latter.
Another feature of the invention is hydraulically pow
by an undershoulder 17 is provided which bears upon the
ered piston means for effecting such positioning of the
top surface of the chassis and thus limits the downward
drill slide guide.
’
position of the trunnion in the bore. The trunnion is
prevented from rising vertically in the bore by a trunnion
Another feature of the invention is remotely operable
cap 18 secured to its bottom.
control means for operating the hydraulically powered
piston means.
The cap (FIG. 6) has a base plate portion 19, which
A still further feature of the invention is a common
has a greater diameter than the bottom end of the trun
casting which is pivotable about a horizontal axis to a
nion and bears against the underside of the part 10 of
selected position; and a trunnion supported in the cast
the chassis as the trunnion is rotated. The cap is se
ing having an axis of rotation normal to the said hori 45 cured to the trunnion by means of a threaded boss 21
zontal axis and supporting a drill slide guide in a plane at
thereof which is screwed into a threaded recess 22 in the
right angles to its normal axis.
bottom end of the trunnion. The cap is restrained from
Another feature of the invention is a common chassis
turning loose relative to the trunnion by lock means.
in which interchangeable drill slide guide mounting trun
The latter includes a bolt 23 entered up into the boss
nions may be supported.
50 and having a threaded end portion 24 which crosses a
radial slot 25 and is tightly threaded in a hole formed in
A further feature of the invention is a common casting
an upper yieldable portion 27 of the boss. The threads
having trunnion means supporting a drill slide guide for
of this portion 27 are drawn downward together with
rotation about a vertical axis, and having clamp means
the latter by the tightened bolt 23 into jammed engage
whereby the casting may be removably pivoted upon a
?xed shaft.
55 ment with corresponding threads 28 of recess 22. A lock
washer 29 is disposed between the head of the bolt and
A further feature of the invention is a pair of separate
the trunnion cap. It is clear that the trunnion may be
hydraulically powered means which may be interchange
readily disassembled from the chassis or removed verti
ably employed, one to swing the trunnion about its nor
cally from the bore 12 by loosening bolt 23 and unscrew
mal axis, and the other to dump the chassis about its
ing cap 18 from the trunnion. The corresponding bear
horizontal axis.
ing surfaces of the bore 12 and the trunnion portion 15
A still further object of the invention is to provide a
are lubricated through an associated lube ?tting 31 (FIG.
practical drill positioning device incorporating the vari
1) in the chassis.
ous features above and ful?lling the several objects men
Integral with the top end of the neck 16 of the trun
tioned.
nion
is a horizontal crosshead 32 (FIGS. 1 and 6) which
65
The invention further lies in the particular structure
forms the ‘base of a mount or saddle clamp 33 for sup~
and novel arrangement of its various components, as well
porting the slide guide 14. A pair of opposed jaws 33
as in their cooperative association with one another to
supported along opposite longitudinal sides of the cross
effect the results intended herein.
head on cross bolts 34, provide a clamp for rigidly secur
The foregoing and other objects and advantages of
ing the slide guide in position upon the crosshead. Nuts
this invention will appear more fully hereinafter fro-m
35 threadable upon external ends of the cross bolts serve
a consideration of the detailed description which follows,‘
to draw the jaws into clamped condition about longitudi
3
4
nal feet or ribs 36 extending laterally from the underside
of the slide guide. The ribs 36 are located in parallel
tracks 37 of the crosshead 32, whereby the slide guide
may be slidably adjusted longitudinally in the saddle be
fore the jaws 39 are tightened.
of the swing crank before entering the bore 12 of the
chassis, whereby the collar is caused to sleeve the neck 16
of the trunnion. The swing crank is arranged relative
The slide guide 14 is elongated. It serves both as a sup
port for a conventional drill, such as a rock drill 26 sche
matically shown-in FIG. 10, and as a slide or track over
which the drill may be fed and guided toward and away
from a work site. Drill slide guides, sometimes called
to the chassis so that it has a normal position wherein the
longitudinal axis of the swing crank is parallel to shaft 38
of the chassis and extends rearwardly of'the chassis, as
in FIG. 3. A pair of diametrically opposed locating
screws '66 in the collar of the swing crank have coned
ends 67 which are engageable radially with either of two
pairs of complementary locatingconed holes-68, 69 posi
channels or shells, diifer in form so as to accommodate
tioned 90 degrees apart in the neck 1;‘. of the trunnion
the ‘body of the particular drill to be supported thereon.
This necessitates minor changes in the saddle clamp sec
(as appears in FIGS. 3 and 6). In adjusting the angular
position of the trunnion in the collar, the trunnion is
tion 33 of the trunnion so that the jaws 39 and crosshead
rotated until a selected pair of the holes 63, 69 in the
32 of the saddle clamp will accommodate a modi?ed 15 trunnion register with ‘the ‘locating screws 66, whereupon
mounting portion of the slide guide. Accordingly, trun
he locating screws are threaded throughthe collar radially
to engage the ends 67 thereof into the registered'holes.
nions 13 modi?ed with respect to the saddle clamp, and
in other respects the same, .are interchangeable with one
The position of the trunnion is thereupon ?xed to the
collar of the swing ‘crank. 7it is clear that actuation of the
another in the bore E2 of the chassis. FIG. 7 shows a
modi?ed form of drill slide guide 14’ carried on a modi 20 piston rod in one direction or the other will swing the
trunnion and the associated slide guide accordingly. It is
?ed saddle clamp section 33' of a trunnion 13, the rest
further clear that the trunnion may beadjusted relative
of the trunnion not being shown as it is the same as that
to the collar in either of four angular positions 90 de
detailed in FIG. 6.
The chassis 11 is mounted upon a ?xed horizontal cylin
grees apart by means of the two» pairs of locating holes
drical shaft 38 disposed transverselyof its underside. The 25 68, ‘69 and by means of the locating screws 65.
drill.
A swing crank 41 is associated with the trunnion 13 to
Means is provided to substantially relieve the push and
pull load of the piston rod from the locating screws 66
and to spread it evenly over the collar of the swing crank.
To this end the collar is split through at 71 along the
effect turning or swinging of the latter on its axis so as
longitudinal axis of the swing crank substantially into the
shaft is here illustrated (FIG. 1) as a ?xed or non
rotatable bridge or crosspiece of a U-boom 3% of a rock
crank web 63. The split is relatively broad so that the
to a desired angular position. This crank is powered by
resultant sidearms 72 vformed in the crank web are rela
hydraulic means 42 which is operable remotely by means
tively narrow and are slightly yieldable or resilient in
of a conventional hydraulic ?ow control system 43, sche
response to compressive pressure applied to opposite sides
35 thereof. This slight resilience is aided by a shallow recess
matically illustrated in FIG. 3.
73 in the wall of the collar diametrically opposite to the
The hydraulic means 42 (FIG. 3) includes a piston
split 71. A bolt 74 passing freely through the arms 72
cylinder 44 which is pivoted upon the chassis so as to
swing in a plane that intersects the vertical axis of the
of the split is tightened by a nut at its opposite end;
trunnion at right angles. In the normal position of the
whereby the arms are drawn yieldably toward one an
other so that the closely ?tting collar grips fast to the
chassis, as in FIGS. 1-3, cylinder 44 swings in a hori
zontal plane. The cylinder is pivotally mounted at its
neck of the trunnion.
'
to carry the slide guide and the drill carried on the latter
left end (FIGS. 3, 4, 5) between a pair of vertically spaced
The swing crank, when actuated, is adapted to swing
ears 45 of the chassis upon a pair of pivot pins 47. A
cap or head ‘46 closing over the outer end of the cylinder
has an-intake connection 43 with a hose line 49, whereby
hydraulic fluid may be fed into the cylinder to drive a
the trunnion on its axis and as a result carry the associated
piston 51 therein forwardly. A piston rod 52 connected
slide guide 14 through an angular distance of 90 degrees
in either of the four angularly adjusted positions-of the
trunnion. It is clear that positioning of the slide guide
through 360 degrees is therefore possible by'utilizing all
four positions of the trunnion. The swing crank is shown
in FIG. 3 in its normal position, from which it may be
connection 55 with a hose line 56, whereby hydraulic ?uid 50 swung 45 degrees in a horizontal plane in either direction.
may be fed into the cylinder to drive the piston in a
In this normal position of-the swing crank, the piston 51
is disposed at about the mid-point of its travelling distance
return direction. The hose lines 49 and 56 are connected
with a hydraulic fluid distribution device '57 of the hy
in the cylinder, and an axis line drawn through the centers
of the pivot 47 of the piston cylinder and the crank pin 62
draulic ?ow control system 43, in which is incorporated
slide valve means 5'8 remotely operable by a three posi 55 is approximately 15 degrees clockwise from an east-west
position indicated by the brokenline in FIG. 3. When
tional hand lever, not shown, and an associated pull wire
the piston has been fully moved to either its left position
61. In one position of the lever, ?uid ‘feed to the cylin
der is over the line 49, and return flow is over the line
L, or its right position R, the crank arm 63 will havebeen
to the piston works through a head 54 closing over the
inner end of the cylinder. The latter end has an intake
56. In a second position of the lever, the reverse condi
tion exists; and in a neutral position, flow over both hose
swung 45 degrees counterclockwise or clockwise accord
cated hole of a crank arm or web 63 of the swing crank
41. A set screw 64 restrains the crank pin in the crank
arm against endwise movement. The swing crank has a
in thelatter plane.
ingly, and the cylinder will in each case have pivoted 15
degrees to the broken line position. The broken lines CC
lines is blocked, whereby the piston is locked against
movement by ?uid trapped in the cylinder at the ends
and CW indicate the clockwise and counterclockwise posi
tions of the swing crank. In therswinging actionthe trun
of the piston.
nion 13 is turned about its vertical axis, and the slide
The piston rod 52 has a thickened free end 69 pivoted
upon a crank pin 62 extending at right angles therefrom. 65 guide, which is supported in a plane at right angles to the
said axis of the trunnion, is carried about by the trunnion
The crank pin projects vertically into an eccentrically lo
To obtain further positioning, such as positioning vof
the slide guide 14 angularly in a vertical plane, the chassis
collar main portion 65 which sleeves, and is ?xed by 70 11 can be pivoted or dumped about its lateral axis, repre
sented by the axis of shaft 38. A dump crank 76 (FIGS.
suitable means to the neck 16 of the trunnion, whereby
1-4) is associated with the chassis to eifect such dumping
actuation of the swing crank turns the trunnion on its
action. The dump crank is ?xed upon shaft 38 and is
axis.
powered by hydraulic means 77, also operable remotely
In assembling the trunnion to the chassis, the lower part
15 of the trunnion is entered down through the collar 65 75 by the hydraulic flow control system 43.
3,021,099
5
8
The chassis 11 is pivotally mounted upon shaft 38 by
clamp means 78 at its underside. An advantage of the
clamp means is that it permits assembly and disassembly
disturbing the latter. The clamp means includes in part
the surface of a broad semi-circular bore or cavity 79
tightened by nuts externally threaded on the bolts, cause
the arms 107, 108 to clamp or grip the shaft fast. Arm
187 is extended by the crank arm 105 thereof radially be
yond one of its hinge barrel elements 111, and carries at
its free end an offset barrel 122 providing the hole in
which the crank pin 103 is retained.
formed transversely of the underside of the chassis, which
The dump crank is selectively adjustable to different
of the chassis from the shaft in a radial direction without
surface is adapted to bear upon shaft 38. Offset from the
angular positions on shaft 38. To this end, a set of
diametrically opposed locating screws 123 are threadable
left end (FIG. 1) of the chassis is a hinge barrel 81 the
axis of which is parallel to that of the surface 79 and shaft 10 through bossed portions of the respective arms of the
38. A broad clamp yoke bar 82 is bifurcated in its left
dump crank to locate coned free ends thereof in one or
end, as appears in HS. 8, to provide a pair of laterally
the other of two sets 125, 126 of opposed coned locator
spaced yoke arms 89 which extend freely and tangently
holes in shaft 38. The location of screws 123 is made
over opposite areas of the lower part of the cylinder por
while the clamp bolts 110 are sufficiently loose to permit
tion 18 of the chassis. Bar 82 has a pair of laterally
the dump crank to be adjustably rotated. After location
spaced offset hinge barrels 83 provided at the ends of the
of the screws is accomplished, the clamp bolts 110 are
yoke arms 80. These are aligned axially with opposite
securely tightened, whereby the dump crank is prevented
ends of the hinge barrel 81 of the chassis and are hingedly
from rotating on the shaft, and ‘also from moving its
position in an axial direction.
connected to the latter by a pintle 84 inserted in the
aligned barrel elements. A set screw 85 in the hinge bar 20
In FIG. 2, the chassis 11 is held by the located position
rel 81 restrains the pintle against endwise escape. The
of the dump crank and by the associatedhydraulic means
surface 86 of a semi-circular bore or cavity in the clamp
bar 82 opposes and complements the surface 79 of the
chassis and bears or seats upon shaft 38. The clamp bar
is maintained in bearing relation to the shaft by a pair of 25
77 in its normal or horizontal position atop shaft 38. In
this position of the chassis, the piston 188 is at the extreme
left end of its cylinder 99, and is so held by hydraulic ?uid
127 trapped at its rear. The locked condition of ‘piston
188, and the ?xed condition of the dump crank on shaft 38
prevents angular movement of the chassis from this nor
mal position until the back pressure of the trapped hy
bolts 87 at one side of the latter and a second pair 88 at
the opposite side. Bolts 87 which pass through holes in
an offset end 89 of the clamp bar are tightly threaded in
holes in the underside of the cassis. Bolts 88 which pass
draulic ?uid is relieved. The hydraulic means 77 is op~
through offset ears 91 of the chassis and through arms 88 30 erable to dump or pivot the chassis counterclockwise from
are retained by nuts 93, but the latter are normally loose
its normal position and to return it clockwise to normal
so as to avoid clamping bar 88 fast to shaft 38. The bear
position.
ing relation of the opposed semi-circular surfaces 79, 86
To dump the chassis counterclockwise of the position
of the chassis and the clamp bar upon the shaft 38 is
shown in FIG. 2, hydraulic ?uid is applied to the return
properly adjusted and retained by shims or washers 90 35 end 129 of the piston and is relieved from the opposite
about the bolts 87. If for any reason it is desired that
end, whereupon the chassis 11 dumps or pivots progres
the chassis be temporarily fixed to shaft 38, as when mak
sively counterclockwise as the piston 188 progressively
ing an adjustment of the drill slide guide, then the bolts
returns into its cylinder. Counterclockwise movement of
88 and nuts 93 are temporarily tightened for this purpose,
the chassis will be limited when the piston has been fully
and then subsequently loosened again.
40 returned, and in this movement the chassis will have
The hydraulic means 77 powering the dump crank 76
pivoted through an arc of 90 degrees from normal hori
is similar to and interchangeable with the hydraulic means
zontal to a vertical position, as indicated schematically in
42 powering the swing crank 41. It is also similarly con
FIG. 9. The chassis may be restored clockwise to nor
trolled through the hydraulic ?uid distributor 57 by sepa
mal by directing feed ?ow of hydraulic ?uid to the oppo
rate feed and return hose lines 95, 96, and by a separate
site end 128 of the piston. The chassis may be limited
slide valve 97 and control wire 98.
in any intermediate position by trapping the hydraulic
The piston cylinder 99 of the hydraulic means asso
?uid in the cylinder at opposite ends of the piston.
ciated with the dump crank is pivotally mounted on pins
The dump crank may be adjusted as in FIG. 10 coun
110 between a pair of laterally spaced ears 101 projecting
terclockwise to a second position wherein the locator
from the right end of the chassis (FIGS. 3, 4, 5 ), whereby 50 screws 123 are located in the second set of locator holes
the cylinder pivots in a vertical plane. The latter plane
is perpendicular to the plane in which the cylinder 44 of
the swing crank pivots. The thickened free end 184
of the piston rod 102 of a piston 188 in the dump crank
cylinder turns on a crank pin 183 which extends laterally
at right angles into a hole in the crank arm 105 of the
dump crank. The crank pin is retained in the crank arm
by a set screw 186.
126 of the shaft. In this adjustment the limited clock
wise position of the chassis will appear as in FIG. 10.
It is obvious that the dump crank may be selectively ad
justed angularly in any one of four angular positions
about the cross shaft as determined by the holes 125 and
126.
A collar or stop 128 clamped upon the shaft and hear
ing against the chassis serves to restrain axial movement
The dump crank is clamped fast upon shaft 38 so that
it may be readily assembled upon or removed from the
shaft in a radial direction. To this end, it comprises a
pair of broad semi-circular clamping members or arms
of the chassis along the shaft away from the dump crank.
The locating holes 125, 126 are repeated, though not
shown, at the opposite end of shaft 38 so that the dump
107, 188 hingedly connected together. An offset laterally
as to face in the opposite direction, whereby further angu
lar positioning of the chassis and the associated slide
extending hinge barrel 109 of arm 108 is received between
crank and the chassis may be reversed upon the shaft so
and aligned with a pair of offset hinge barrels 111 of the 65 guide is enabled.
arm 187, and a pintle 112 passed through the aligned bar
It is clear that through a combined usev of the dump
rel elements holds them in hinged relation. A set screw
and swing cranks, and by means of the adjustable posi
113 in hinge barrel 109 prevents endwise movement of
tions of the trunnion and of the dump crank, the drill
the pintle. A semi-circular bore or cavity 114 in the
slide guide and, as a consequence, a drill thereon can be
inner face of arm 187 complements an opposed similar 70 universally positioned. The drill slide guide may be posi~
cavity 115 in arm 188. The surfaces of these cavities
tioned universally in a horizontal plane, and universally
seat against opposed areas of the shaft when the arms 107,
in all angular planes away from horizontal according to
108 are clamped about the latter. A pair of laterally
the dumped position of the chassis.
spaced bolts 118 inserted through registered pairs of holes
While an embodiment of the invention has been illus
in' offset free ends 118, 119 of the respective arms and
trated and described in detail, it is to be expressly under
3,021,099
8
7
with one another in the bore of the casting, wherein the
bore of the casting opens through the bottom end there
of, and a cap removably engaged to the lower end of
the trunnion and abutting the casting prevents the trun~
nion from lifting upwardly out of the bore relative to
stood that the invention is not limited thereto. Various
changes can be made in the design and arrangement of
the parts without departing from the spirit and scope of
the invention as the same will now be understood by
those skilled in the art; and it is our intent, therefore, to
claim the invention not only as shown and described but
also in all such forms and modi?cations as may reason
the casting.
'5. A device as de?ned in claim 2, wherein the trun
ably be construed to-fall within the spirit of the invention
and the scope of the appended claims.
nion is angularly adjustable relative to the swing crank
through 360 degrees to a plurality of predetermined posi
What is claimed is:
l. A device for effecting angular positioning of a drill
slide guide, comprising a non-rotatable horizontal shaft
supported in elevated relation to the ground, a block
member de?ning a chassis pivotable through 360 degrees
tions.
6. A device as de?ned in claim 2, wherein the casting
is characterized by a detachable clamp at its underside
about said shaft, hydraulically powered piston, means
individual to the chassis for controlling the pivoting there
pivotally mounting the casting upon the shaft, whereby
the casting together with both hydraulic cylinders there
15 on may be removed as a unit in a radial direction from
the shaft after disengaging the crankpin associated with
the dump crank and upon detaching the clamp without
disturbing the position of the shaft.
of in successive increments of 90 degrees each, a trun
nion pivotable on the chassis through 360 degrees about
an axis normal to said shaft and carrying externally of
'the chassis a saddle adapted to support a drill slide guide
in a plane at right angles to said normal axis, and hy
draulically powered piston means individual to the trun
nion for controlling the pivoting thereof about the said
7, In a device of the character described including a
chassis block having a trunnion bearing bore opening
through opposite surfaces of the chassis block; a trunnion
comprising a cylindrical body portion received in the
bore for turning in the latter through 360‘ degrees, a
neck of greater diameter than the bore unitary with an
7 ,axis in successive increments of 90 degrees each.
2. A device for effecting angular positioning of a drill
.slide ‘guide, comprising in combination with a U-boom
having a pair of laterally spaced supporting arms and a
non-rotatable shaft bridging the ends of the arms, a cast
ing mounted upon the shaft for rotation around the lat
upper end of the cylindrical body portion and bearing
tion to the trunnion in a selected one of said positions,
9. In a device of the character described, a cylindrical
externally of the bore upon a top surface of the chassis
block, the neck being headed by a drill slide guide mount
and being adapted for connection with crank means for
turning the trunnion in the bore, retainer ‘means detach
ter between the arms of the U-boom, the shaft de?ning a 30 ably associated with a bottom end of the cylindrical body
portion of the trunnion preventing lifting of the trunnion
horizontal axis for the casting, a trunnion rotatable in
out of the bore, and a rigid shaft supported in elevated
the casting and having an axis of rotation normal to the
position; wherein the chassis has a front end and a rear
said horizontal axis, the trunnion integrally carrying ex~
end, and mounting means is provided midway of the ends
ternally of the casting a saddle adapted to support a drill
of the chassis for detachably mounting the chassis upon
slide guide in a plane at right angles to the said normal
the shaft in either of two selectable positions for rota
axis, a dump crank having a mounting portion received
tion about the shaft, in one of which positions the front
upon the shaft and adjustable around the shaft to a plu
end faces in one direction and in the other it faces in
rality of circumferentially spaced selectable positions, re
the opposite direction, crank means selectively ?xable
leasable fastening means ?xing the mounting portion to
.the shaft in a selected one of said positions, and the 40 upon one or the opposite ends of the shaft accordingly
as the casting faces in one direction or the other, and
dump crank having an arm portion extending from the
hydraulically powered piston means mounted upon the
mounting portion at right angles to the shaft, a ?rst hy
chassis and having a pivot pin connection with the crank
draulic cylinder pivoted upon the casting on an axis
means for actuating the casting about the rigid shaft.
parallel to the said horizontal axis, a piston hydraulically
8. In a device as de?ned in claim 7, wherein the re
workable in the cylinder and having a piston rod, a crank
tainer means comprises a screw cap having a threaded
pin at the end of the latter having a pivot connection with
reduced boss portion centrally of one face thereof thread
the outer end of the arm of the dump crank for effecting
edly engaged in a complementary threaded recess in the
turning of the casting about the shaft relative to the dump
bottom end of the cylindrical body portion of the trun
crank upon working of the piston, a swing crank having
nion, and a marginal surface peripherally about the base
a mounting portion received upon the trunnion externally
of the casting and adjustable around the trunnion to a 50 of the boss of greater diameter than the adjacent end of
the bore and bearing against the adjacent surface of the
plurality of circumferentially spaced selectable positions,
chassis block.
releasable fastening means fixing the latter mounting por
non-rotatably supported shaft, a chassis block having a.
and the swing crank having an arm portion extending
semi-circular cavity surface in its underside bearing upon
55
from the related mounting portion at right angles to the
the cylindrical shaft, a bar hingedly connected at one end
trunnion, a second hydraulic cylinder pivoted upon the
to the underside of the chassis block having a semi-circu
casting on an axis parallel to the said normal axis, a piston
lar cavity surface complementing that of the chassis block
hydraulically workable in the second cylinder having a
and seated upon an opposite surface area of the shaft,
piston rod, and a crankpin at the end of the latter having
fastening elements removably securing the free end of
a pivot connection with the outer end of the arm of the
swing crank for effecting turning of the trunnion on its
normal axis relative to the casting upon working of the
piston in the second cylinder.
60
the bar to the chassis block, means for maintaining the
opposed semi-circular surfaces in uniform bearing rela
tion to the shaft, a crank ?xed selectively to one end or
the opposite end of the shaft adjacent a speci?c side of
3. A device as de?ned in claim 2, wherein the ?rst 65 the chassis according to the direction the chassis is caused
and second hydraulic cylinders are identical in structure
to face when seated upon the shaft, and a hydraulically
whereby they are interchangeable with one another upon
powered piston means including a cylinder pivotally sup
the casting.
ported upon the chassis on an axis parallel to that of the
4. A device as de?ned in claim 2, wherein the trun
shaft and including a piston rod hydraulicaly workable
nion has a cylindrical body portion removable disposed 70 in and out of the cylinder and having a pivot pin con
in a bore of the casting, and an external neck portion
nection with the crank.
10. In combination, a U-boom having a pair of sup
joining the said body portion with the saddle, and the
swing crank being removably ?xed to the neck portion,
whereby trunnions in all respects the same but modi?ed
as to the form of the saddle thereon are'interchang'eable
porting arms and a non-rotatable horizontal shaft ?xed
transversely of the outer ends of the arms, a casting ro
tatably-mounted upon the shaft between the arms and
8,021,099
9
It)
adapted to support a drill slide guide the axis of rotation
of the casting upon the shaft being midway of a forward
ton, the latter means including a crank mounted to the
end and a rear end of the casting” a crank arm releas
trunnion, a hydraulic piston cylinder pivoted upon the
ably ?xed to the shaft at right angles, the crank arm be
ing adjustable, when released, around the shaft to a plu
rality of circumferentially spaced selectable positions and
having releasable fastening means for securing it in any
angle of 90 degrees upon a cycle of operation of its pis
support having a pivot axis parallel to that of the trunnion
and having an operating pivot range of ?fteen degrees
about its pivot, and a piston hydraulically workable in and
out of the cylinder having a free end pivoted to the crank;
and means enabling after each cycle of operation of the
piston manual relocation of the said crank about the
one of said selectable positions, a hydraulic cylinder hav
ing a head end pivoted to the casting on an axis parallel
to the shaft and in spaced relation thereto, a piston hy 10 trunnion to a distance 90 degrees removed from its then
draulically reciprocable in the cylinder, a piston rod ex
particular location.
tending from the piston through the head end of the cyl
14. An arrangement for hydraulically positioning a
inder and having a crank pin connection at its free end
drill assembly through 360 degrees in increments of 90 de
with the crank'arm for e?’ecting turning of the casting
grees about a horizontal axis and for positioning the drill
upon the shaft relative to the crank arm upon working 15 assembly through 360 degrees in increments of 90 de
of the piston in the cylinder, and means for hydraulically
grees about an axis normal to the horizontal axis, com
locking the piston in any selected position in the cylinder.
prising a horizontal non-rotatable shaft supported in ele
11. In combination, a non-rotatable shaft, a casting
vated relation to the ground, a chassis mounted upon
detachably mounted upon the shaft for rotation about
the shaft for rotation thereon through 360 degrees, a
the latter, the casting having an elongated body and the 20 crank received upon the shaft adjacent to the chassis
axis of rotation thereof upon the shaft being substan
and extending from the shaft at right angles, the crank
tially midway of opposite ends of the body means sup
being selectively positionable circumferentially about the
ported by the casting for mounting a drill slide guide, a
shaft in any of four positions each spaced 90 degrees
crank arm releasably ?xed to the shaft at right angles,
apart, fastening means carried by the crank for releasably
a hydraulic cylinder having a head end pivoted to the 25 ?xing the crank to the shaft in any selected one of said
casting on an axis parallel to the shaft and in spaced re
positions, a hydraulically powered piston means having a
lation thereto, a piston hydraulically reciprocable in the
cylinder pivoted upon the chassis on an axis parallel to
cylinder, a piston rod extending from the piston through
that of the shaft, a piston rod hydraulically extensible
the head end of the cylinder and having a crank pin con
from and retractable into the cylinder, and a crank pin
nection at its free end with the crank arm, the piston hav 30 pivotally engaging the outer end of the piston rod with
ing a normal position limited at the head end of the
the crank; the chassis having an initial position when
cylinder wherein the casting has a predetermined normal
the piston rod is fully extended and having a position an
position upon the shaft, and the piston having an op
gularly moved from its initial position a distance of 90
posite end position in the cylinder wherein the casting is
degrees when the piston rod is fully retracted; a bore in
angularly removed 90 degrees from the said normal posi 35 the chassis; a trunnion swiveled in the bore for turning
tion, means for hydraulically moving the piston to and
in the latter through 360 degrees about an axis normal
locking it in either position, the crank arm being adjust
to the horizontal axis of the shaft, the trunnion having a
able, when released, around the shaft to a plurality of
neck portion externally of the bore above the chassis
selectable positions each spaced 90 degrees circumfer
headed by a drill assembly; a swing crank received upon
entially from the other, and the crank arm having re
the neck portion and extending therefrom at right angles,
leasable fastening means for securing it fast in any one
the swing crank being selectively positionable circumfer
of said selectable positions.
entially about the neck in any of four positions each
12. An arrangement for hydraulically positioning a
spaced 90 degrees apart; fastening means carried by the
drill assembly through 360 degrees, comprising a ?xed
crank for releasably ?xing the crank to the trunnion in
support, trunnion means swivelled upon the support for 45 any selected one of said positions; a hydraulically powered
rotation relative to the latter through 360 degrees and
piston means having a swing cylinder pivoted upon the
adapted to carry a drill assembly, hydraulic piston pow
chassis on an axis parallel to the axis of the trunnion, a
eredcrank means for swivelling the trunnion through an
piston rod hydraulically extensible from and retractable
angle of predetermined degree upon a cycle of operation
into the swing cylinder, and a crank pin pivotally engag
of its piston, the latter means including a crank mounted 50 ing the outer end of the latter piston rod with the swing
to the trunnion, a hydraulic piston cylinder pivoted upon
crank, the trunnion having an initial position when the
the support, and a piston hydraulically workable in and
related piston rod is fully retracted in the swing cylinder,
out of the cylinder having a free end pivoted to the crank;
and the trunnion having a position 90 degrees removed
and means enabling manual relocation of the said crank
when the related piston rod is fully extended from the
about the trunnion to a selected one of a plurality of po
sitions each spaced angularly a predetermined degree from
the other.
13. An arrangement for hydraulically positioning a
drill assembly through 360 degrees, comprising a ?xed
55 swing cylinder.
-
References Cited in the ?le of this patent
UNITED STATES PATENTS
support, trunnion means swivelled upon the support for 60
1,509,022
rotation relative to the latter through 360 degrees and
2,559,711
adapted to carry a drill assembly, hydraulic piston pow
2,598,112
ered crank means for swivelling the trunnion through an
Noble ______________ __ Sept. 16, 1924
Dansereau __________ __ July 10, 1951
Curtis ______________ __ May 27, 1952